Question about sentences

Dear all,

Kindly correct the mistakes in the following text.

I have learnt that some people cannot be reasoned with and that a even simple message can't penetrate their brain hole.

I had stopped caring about a fringe connection long back but somehow instead staying in my past, they keep clinging to the soles of my shoes like cow dung .
There is no forgiveness required for ignorance. Neither was there ever an effort to seek revenge and for that matter, why would revenge be needed in first place when said person is just deluding themselves .
A graduation certainly doesn't signify maturity. It has to come from their words, thoughts and actions.

But then again age is definitely not a criteria for maturity either as some have showed how vastly underdeveloped they are in that respect.

Thank you.