But this I say: He who sows sparingly will also reap sparingly, and he who sows bountifully will also reap bountifully. 2 Corinthians 9:6
Spiritual laws cannot be broken. As much as we want to, they are is impossible to change because God gave those to us so we walk in them, and to teach us that there is an order established by Him. Otherwise, each one would do as they wish. This would be chaos, one impossible to control. That is why God, from the beginning of creation, set rules for us to remain under these; and this way his backup is ensured.
The backup from God is necessary and mandatory, since we can achieve nothing without it, for we would go beyond provisions. We know the spiritual world, but we want to keep doing things our own way. We expect to receive the same reward as if we were doing what He commands.
Then, we are wrong. We can never have the same results as those who do obey, who cling on to his principles. That is why we cannot pretend to harvest if we do not sow, or expect abundance if what we sow was sparing. If we want love, let us sow love; if we want peace, let us sow peace; for as your seed is, so shall you harvest be.