“How thankful we ought to be ... how thankful we are, for a prophet to counsel us in words of divine wisdom as we walk our paths in these complex and difficult times. The solid assurance we carry in our hearts, the conviction that God will make his will known to his children through his recognized servant is the real basis of our faith and activity. We either have a prophet or we have nothing: and having a prophet, we have everything” (Teachings of Gordon B. Hinckley, pgs. 499–500).

Trial and challenges

(1) "I cannot promise an end to your adversity in this life. I cannot assure you that your trials will seem to you to be only for a moment. One of the characteristics of trials in life is that they seem to make clocks slow down and then appear almost to stop.
There are reasons for that. Knowing those reasons may not give much comfort, but it can give you a feeling of patience. Those reasons come from this one fact: in Their perfect love for you, Heavenly Father and the Savior want you fitted to be with Them to live in families forever. Only those washed perfectly clean through the Atonement of Jesus Christ can be there.
(President Henry B. Eyring, Mountains to Climb, General Conference, Apr 2012)

(2) "We must ask in prayer that God, by the power of the Holy Ghost, will help us see our blessings clearly even in the midst of our trials. He can help us by the power of the Spirit to recognize and be grateful for blessings we take for granted."   
(President Henry B. Eyring, The choice to Be Grateful, Liahona, Dec 2011) 

(3)  "I invite you to consider the words spoken by the servants of God this weekend. Then get on your knees. Ask God, our Heavenly Father, to enlighten your mind and touch your heart. Plead with God for guidance in your daily lives, in your Church responsibilities, and in your specific challenges at this time. Follow the promptings of the Spirit—do not delay. If you do all this, I promise that the Lord will not leave you to walk alone."
(President Dieter F. Uchtdorf, The Why of Priesthood Service, General Conference, April 2012)

(4) "We live in a time of turmoil. Earthquakes and tsunamis wreak devastation, governments collapse, economic stresses are severe, the family is under attack, and divorce rates are rising. We have great cause for concern. But we do not need to let our fears displace our faith. We can combat those fears by strengthening our faith."
(Elder Elder Russell M. Nelson , Face the Future with Faith, General Conference, April 2011)

(5) "Why do we need such resilient faith? Because difficult days are ahead. Rarely in the future will it be easy or popular to be a faithful Latter-day Saint. Each of us will be tested. The Apostle Paul warned that in the latter days, those who diligently follow the Lord “shall suffer persecution.”12 That very persecution can either crush you into silent weakness or motivate you to be more exemplary and courageous in your daily lives."
(Elder Elder Russell M. Nelson , Face the Future with Faith, General Conference, April 2011)

(6) “I testify to you that our promised blessings are beyond measure. Though the storm clouds may gather, though the rains may pour down upon us, our knowledge of the gospel and our love of our Heavenly Father and of our Savior will comfort and sustain us and bring joy to our hearts as we walk uprightly and keep the commandments.” 
(President Thomas S. Monson, Be of Good Cheer, Liahona and Ensign, May 2009, 92.)
(7) "The Church is a mooring in this tempestuous sea, an anchor in the churning waters of change and division, and a beacon to those who value and seek righteousness. The Lord uses this Church as a tool in pulling His children throughout the world toward the protection of His gospel." 
(Elder M. Russell Ballard, That the Lost May Be Found, General Conference, April 2012)

 (8) "The Savior loves each of us and will make it possible for our every need to be satisfied as we qualify by obedience for all of the blessings He wants us to have on this earth. 
(Elder Richard G. Scott, He Lives! All Glory to HIs Name, General Conference, April 2010)  
(9)  "As endowed temple recommend holders, we establish patterns of Christlike living. These include obedience, making sacrifices to keep the commandments, loving one another, being chaste in thought and action, and giving of ourselves to build the kingdom of God. Through the Savior’s Atonement and by following these basic patterns of faithfulness, we receive “power from on high” to face the challenges of life. We need this divine power today more than ever. It is power we receive only through temple ordinances. I testify that the sacrifices we make to receive temple ordinances are worth every effort we can make." 
(Elder Robert D. Hales, Coming to Ourselves, The Sacrament, the Temple and Sacrifice in service, General Conference, April 2012)
(10) "In many of the uncertainties and challenges we encounter in our lives, God requires us to do our best, to act and not be acted upon (see 2 Nephi 2:26), and to trust in Him. We may not see angels, hear heavenly voices, or receive overwhelming spiritual impressions. We frequently may press forward hoping and praying—but without absolute assurance—that we are acting in accordance with God’s will. But as we honor our covenants and keep the commandments, as we strive ever more consistently to do good and to become better, we can walk with the confidence that God will guide our steps. And we can speak with the assurance that God will inspire our utterances. This is in part the meaning of the scripture that declares, “Then shall thy confidence wax strong in the presence of God” (D&C 121:45). " 
(Elder David A. Bednar, The Spirit of Revelation, General Conferenc, April 2011)