I dont give to get increase What a selfish thought
You're going to have to take it up with God then. I would like you to ponder what makes you think self-interest in any way, shape, or form devalues giving? Self-interest is not inherently sinful.
Malachi 3:10King James Version (KJV)
10 Bring ye all the tithes into the storehouse, that there may be meat in mine house, and prove me now herewith (thats a challenge), saith the Lord of hosts, if I will not open you the windows of heaven, and pour you out a blessing, that there shall not be room enough to receive it.
To give to get is actually one of the most self-less principles you could live by. According to the world you are subtracting from what you have to bless others, but as we know according to the Word, we are actually increasing or multiplying that which we have given. We give and are blessed for doing so, even in Proverbs it speaks of pitying the poor is like lending to the Lord and He shall repay you. Its an incentive to give, not that such incentive is needed but its just the way it works.
You give, you prosper, and you can use that prosperity to further the Kingdom. You can use your finances to spread the Gospel and build churches. You can use it to send missionaries. You can use it as a tool to bring glory to God. To give to get an increase is by no means a self-centered principle as what it does is bless others and then it also comes back to you multiplied. It encourages giving. All parties win and the giver wants to give more because they know they will see a return on it and will then be able to give more later. Its an endless cycle of increase and all parties involved benefit.
Self-interest is not selfish, in a negative way. Self-interest has a lot of positive effects, in regards to giving it promotes generosity through the principle of sowing and reaping. People worry about the love of money a lot and I once read one way to stay away from the love of money is to subscribe to this particular statement. Love people and use money, never the other way around. It's a good mindset to have.
PS: It cannot be selfish to give to get as you are at the same time giving. An expectation of a return in no way devalues the gift. God gave His Son and expected a harvest of believers as a result, do you suppose God had self-interest? Did it devalue Jesus because He gave His Son to bring about more children of God? Of course not.
How can you tell a man giving money to the homeless he is selfish if he expects a return yet all the while he is giving to the homeless? Feeding the hungry, giving them shelter and clothing and you have the audacity to call him selfish? All because he believes God honors His Word? Its a blessing in itself to give to others and see the impact you have on others through your giving, but its also a blessing to know its coming back one hundred fold so that you can increase in your giving.