Discouragement
Isa 40:31
31 But they that wait upon the Lord shall renew their strength; they shall mount up with wings as eagles; they shall run, and not be weary; and they shall walk, and not faint. KJV
John 14:27
27 Peace I leave with you, my peace I give unto you: not as the world giveth, give I unto you. Let not your heart be troubled, neither let it be afraid. KJV
Gal 6:9
9 And let us not be weary in well doing: for in due season we shall reap, if we faint not. KJV
Heb 10:35-36
35 Cast not away therefore your confidence, which hath great recompence of reward.
36 For ye have need of patience, that, after ye have done the will of God, ye might receive the promise. KJV