Henry Van Dyke,
Joy and Power: Three Messages with One Meaning
“ It is the law of life itself that every being seeks and strives toward the perfection of its kind, the realization of its own specific ideal in form and function, and a true harmony with its environment. Every drop of sap in the tree flows toward foliage and fruit. Every drop of blood in the bird beats toward flight and song. In a conscious being this movement toward perfection must take a conscious form. This conscious form is happiness,—the satisfaction of the vital impulse,—the rhythm of the inward life,—the melody of a heart that has found its keynote. ”
