Thomas Kempis

Love feels no burden, regards not labors, strives toward more than it attains, argues not of impossibility, since it believes that it may and can do all things. Therefore it avails for all things, and fulfils and accomplishes much where one not a lover falls and lies helpless.

Love is swift, sincere, pious, joyful, generous, strong, patient, faithful, prudent, long-suffering, courageous, and never seeking its own; for wheresoever a person seeketh his own, there he falleth from love.