Matthew 19:11-12

But he said unto them, Not all men can receive this saying, but they to whom it is given. For there are eunuchs, that were so born from their mother’s womb: and there are eunuchs, that were made eunuchs by men: and there are eunuchs, that made themselves eunuchs for the kingdom of heaven’s sake. He that is able to receive it, let him receive it.