Jesus explains the essence of kingdom growth, both with evangelism and discipleship, both our efforts to others and for our own selves.
The man does what he is supposed to; he scatters seed on the ground. The man sleeps, and he rests, and he doesn’t know exactly how it grows, the earth does the work itself. The secret of growth is in the seed, not in the soil, nor in the weather, nor in the cultivating. These all help, but the seed spontaneously works according to its own nature. If it is spread on good ground it does grow, and if you are saved you are good ground, but you have to keep sowing it and sharing it. It is a process, and it takes patience. A good farmer knows what he is looking for, and he waits till the crop is ready before he tries to harvest it.
Crops are planted every season, and we have to keep on planting the Word in our lives. Again, it is use it or lose it. Even then, we have to be patient because growth means time and commitment. It also means growing pains. If we do not continue to renew our minds (Romans 12:12 / Ephesians 4:23) we will always be moving before the time is right. Once we are practiced, we can mature in the process, and we can move with patient diligence (Hebrews 5:14 / James 5:7-8).