I do so dearly believe that no half-heartedness and no worldly fear must turn us aside from following the light unflinchingly.
J.R.R. Tolkien (1892-1973) English writer, fabulist, philologist, academic [John Ronald Reuel Tolkien]
Letter to Edith Bratt (1913)
(Source)
Bratt was Tolkien's fiancee, who was apprehensive about the personal and social ramifications of converting to Catholicism. Tolkien's mother's conversion had been similarly difficult.