Give-Receive Law

I got this in an email from someone:

YOU ONLY GET TO KEEP WHAT YOU GIVE AWAY

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It's a universal law: You have to give before you get.
You must plant your seeds before you reap the harvest.
The more you sow, the more you will reap.
In giving to others, you will find yourself blessed.

The law works to give you back more than you have sown.
The giver's harvest is always full.
Those that obtain have little.
Those who scatter have much.

Nature does not give to those who will not spend.

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What do you think? It makes sense to me, but it's an easier law to comprehend than to trust. Maybe it's not true, or maybe it needs a balance.

"In all this I have given you an example that by such work we must support the weak, remembering the words of the Lord Jesus, for he himself said, 'It is more blessed to give than to receive.'" Acts 20:35

"For you know the generous act [grace] of our Lord Jesus Christ, that though he was rich, yet for your sakes he became poor, so that by his poverty you might become rich." 2 Cor 8:9

"The Israelites did so, some gathering more, some less. But when they measured it with an omer, those who gathered much had nothing over, and those who gathered little had no shortage; they gathered as much as each of them needed." Exod 16:17-18