The desire of power in excess caused the angels to fall; the desire of knowledge in excess caused man to fall; but in charity there is no excess, neither can angel or man come in danger by it.

Francis Bacon (1561-1626) English philosopher, scientist, author, statesman

“Of Goodness and Goodness of Nature,” Essays, No. 13 (1625)
    (Source)

Often trimmed down to "In charity there is no excess."