Here is a White oak showing growth of acorns and buds. Here is a shot of acorns not fully grown. Photo taken 17-Jul-08 When the acorn is fully grown the cap will only cover 1/4 of the acorn. White oak acorns ripen in one season. The red oak group's acorns take 2 growing seasons to ripen.
Healthy trees relies on reproduction. Our walk with Christ also is only health when we are able to bring new people into a saving knowledge of Jesus. It is part of the armor of God listed in Eph. 6