The bible makes many analogies between blessing and agriculture, these include watering where rain is a symbol of blessing or growing, where blessing is increased through diligence and care.
The Word also mentions preparing the ground and this is probably the most important step in receiving and maintaining a blessing. If we compare what a sower does the picture is clear. The ground is weeded, fertilised and enriched, tilled and sometimes trenched to retain water, before it receives the grain. If the ground is not properly prepared then we get what happened in the parable of the sower where the ground is either dry or full of weeds or has no depth of soil to receive the seed. Rain runs straight through unprepared ground.