Blessed are those that have pure heart ♥. This that have pure heart would see God, don't allow your heart to be full of evil 😈 for people, don't have evil thoughts against your fellow men.
By listening to the word of God, we would be saved, it would purify our heart and it's better we turn away from evil thoughts.
A good heart doesn't have bad feelings, doesn't keep malice with anyone.
People may try to do manners of things to make hearts not to be pure but God still want it to be pure, he made us so as to be good to each other.
In whatever way, let us be God's instruments.