Buddhist book of daily encouragement says:
In all things patience is the key to victory. Those who cannot endure cannot hope to win. Ultimate triumph belongs to those who can forbear.
Emerson writes: “And so of cheerfulness, or a good temper, the more it is spent, the more of it remains.” Cheerfulness is not the same as frivolousness. Cheerfulness is born of a fighting spirit. Frivolousness is the reverse side of cowardly escape. Emerson also said that “power dwells with cheerfulness; hope puts us in a working mood.” Without cheerfulness there is no strength. Let us strive to advance still more brightly and cheerfully.