“… he that shows mercy, with cheerfulness.” Romans 12:8.
You should have a clear apprehension of the gospel. The religious life is not one of gloom and of sadness but of peace and joy coupled with Christlike dignity and holy solemnity. We are not encouraged by our Saviour to cherish doubts and fears and distressing forebodings; these bring no relief to the soul and should be rebuked rather than praised. We may have joy unspeakable and full of glory. –Mind, Character, and Personality, vol. 2, p. 476.
You have a duty to perform, which is to make yourself cheerful and to cultivate unselfishness in your feelings until it will be your greatest pleasure to make all around you happy….
Cheerfulness without levity is one of the Christian graces.
Do not allow the perplexities and worries of everyday life to fret your mind and cloud your brow. If you do, you will always have something to vex and annoy. Life is what we make it, and we shall find what we look for. If we look for sadness and trouble, if we are in a frame of mind to magnify little difficulties, we shall find plenty of them to engross our thoughts and our conversation. But if we look on the bright side of things, we shall find enough to make us cheerful and happy. If we give smiles, they will be returned to us; if we speak pleasant, cheerful words, they will be spoken to us again. –My Life Today, p. 195.