"One thing I want you to understand is if I make a decision, it's my decision"

Mike Singletary is stressing the value of personal obligation and autonomy. He is telling the listener that when he makes a decision, it is his own decision and not influenced by anyone else. He is highlighting that he is the one who is eventually accountable for his choices which he will not be swayed by outside opinions. He is likewise highlighting that he is confident in his own capabilities which he trusts himself to make the right decisions. This quote is a reminder that we need to all take obligation for our own choices and trust ourselves to make the best ones. It is also a reminder that we should not be swayed by outside viewpoints which we should always make every effort to make choices that are best for ourselves.