As you grow tired, as the busyness of life drags you down, never forget that through the bad and the good God is cleansing you. Molding and shaping you.... Transforming you. He is giving you an opportunity to relinquish your life plans and let go of yourself to become who He created you to be.

God is our refuge and strength, an ever-present help in trouble. 
Therefore we will not fear, though the earth give way and the
mountains fall into the heart of the sea, though its waters roar
and foam and the mountains quake with their surging. 
Psalm 46:1-3

Embrace the challenge. Be cleansed. Pursue Christ and use these moments to chase greatness.