What God hath cleansed, that call not thou common.
Trivialising is when you make someone seem less important or significant than he/she really is. Know who you're in Christ.
Have you ever been ignored? I was several times ignored by my friends, pastors, etc., people I never thought would be able to do that.
Simon was a great man of God, used so much to perform miracles but he never thought he had a problem. Until one day he was compelled to fast and instead of eating he fell into a trance. All this was because God wanted him to understand his weakness. The bible says, "And [he] saw heaven opened, and a certain vessel descending unto him, as it had been a great sheet knit at the four corners, and let down to the earth: Wherein were all manner of fourfooted beasts of the earth, and wild beasts, and creeping things, and fowls of the air. And there came a voice to him, Rise, Peter; kill, and eat. But Peter said, Not so, Lord; for I have never eaten any thing that is common or unclean. And the voice spake unto him again the second time, What God hath cleansed, that call not thou common." Acts 10:11-15 KJV
Sometimes God brings into our lives believers who are like this, i.e., people who are like "all manner of fourfooted beasts of the earth, and wild beasts, and creeping things, and fowls of the air." Church sometimes is a vessel full of all sorts. You look at the people and say, "Not so, Lord; for I have never eaten any thing that is common or unclean." Also I know believers who were either trivialized or ignored by their pastors because they weren’t what they expected. Some continued as church members but were treated unimportantly, unfairly, and very cheaply until they had to change churches.
But God gave Simon a lecture before he could meet his visitors, first and foremost "the voice spake unto him again the second time, What God hath cleansed, that call not thou common" Acts 10:15. And "While Peter thought on the vision, the Spirit said unto him, Behold, three men seek thee. Arise therefore, and get thee down, and go with them, doubting nothing: for I have sent them" Acts 10:19-20.
Before God Cornelius was no ordinary person; he was a just man, and one that feareth God, and of good report among all the nation of the Jews. He was a giver and one who would pray always to God. One afternoon an angel of God came to him, saying “Cornelius, Thy prayers and thine alms are come up for a memorial before God." But even though, Peter wasn’t going to receive him because he had made up his mind that Salvation is for the Jews none else.
What lesson did Peter learn that day?
1. What God hath cleansed, that call not thou common.
"Then Peter opened his mouth, and said, Of a truth I perceive that God is no respecter of persons: But in every nation he that feareth him, and worketh righteousness, is accepted with him.  The word which God sent unto the children of Israel, preaching peace by Jesus Christ: (he is Lord of all:) Acts 10:34-36.
I love what Paul had to say to the Corinthians, for he said, "For the love of Christ constraineth us...that they which live should not henceforth live unto themselves, but unto him which died for them, and rose again. Wherefore henceforth know we no man after the flesh: yea, though we have known Christ after the flesh, yet now henceforth know we him no more. Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new. And all things are of God, who hath reconciled us to himself by Jesus Christ, and hath given to us the ministry of reconciliation." 2 Corinthians 5:14-18.
Simple Gospel Summation