What does it mean to be a person after God’s own heart? Seems to me, it means that you are a person whose life is in harmony with the Lord.
From 2 Peter 1:5-7: “For this very reason, you must make every effort to support your faith with goodness, and goodness with knowledge, and knowledge with self-control, and self-control with endurance, and endurance with godliness, and godliness with mutual affection, and mutual affection with love.”
The secret of every discord in Christian homes and communities and churches is that we seek our own way and our own glory.
From Romans 12:15-17: “Rejoice with those who rejoice, weep with those who weep. Live in harmony with one another; do not be haughty, but associate with the lowly; do not claim to be wiser than you are. Do not repay anyone evil for evil, but take thought for what is noble in the sight of all.”