"It's foolish, short-sighted and selfish to leave a physical inheritance at the cost of a spiritual one; foolish because it ignores God, shortsighted because it ends at the grave, and selfish because it elevates our own interests above our children's. Working to accumulate a material inheritance is far easier, because it is less intrusive, less demanding. It allows men to safeguard their time and their preferences. It bears temporal fruit with an eternal price tag." - Lawrence R. Lucas (The Things You'll See)
At no other time in history is it humanly wiser to have less children.
When we look to Jesus, we see that, “for the joy that was set before him he endured the cross...” (Heb. 12:2)
In Hebrew 11, God says that seeking the greater reward is the essence of what faith is: “He who comes to God must believe that exists, and that He rewards those who earnestly seek Him.”
Jim Elliot, that great missionary to Equador said it very well when he famously said,
Jesus went through great agony to give birth to us spiritually. But for him he counted it all a joy.
1 John says, “I have no greater joy than to see my children walking in the faith.”
There is no greater eternally lasting joy than to give our lives to build up children in the faith.