Only the most unapologetic biblical fundamentalists for instance take every biblical injunction literally. If we all took all scripture at the same level of authority then we would be more open to slavery to the subjugation of women to wider use of stoning. Jesus himself spoke out frequently against divorce in the strongest of terms.
Thousands of candles can be lighted from a single candle and the life of the candle will not be shortened. Happiness never decreases by being shared.