Prayer of thanksgiving

We do pray a prayer to give thanks to God,to thank him for what he has done for us, in our life, in our family and all things concerning our life. But there is this mistake I perceive that we do make when praying the prayer of this thanksgiving ok take for example this prayers

"Lord I thank you for giving me life today for many are in the grave for many are gone"

"Lord some are in the sick bed but  am not thank you for that"

All this prayer those it means that God's mercy is not universal, so you are thanking  God for showing you mercy and not showing others mercy,so you would like to get all the blessings and thank God for not giving it to others.

I can a sign of selfishness in this prayer

Because if you are thanking God for giving you food today and not giving to others so tomorrow if God do not give you,then you stop thanking him

Yes that is like mocking others for not recieving the blessing you received.

Let's take and example of two person in the Bible that came to pray in the temple

The first is telling God that he is righteous he pay tithe he stays holy but the others is not,while the other is praying for God to have mercy on him for he is unrighteous.now the one that God answered his prayer is the second one because he do not pray amidst  haven't race is a personal race so don't involve other in your track it will spoil the game.you only nominate people into the race.look at this prayers

"Lord thank you for food today cos some has no food to eat"and "Lord thank you for food today and provide for those without food" which one sounds so good now when you read please think of what you read so as to understand . 

Instead of praying selfish prayer why can't we thank God for what he has done and what you believe he going to do.

                            THANKS