“Blessed are the meek, for they shall inherit the earth.” Matthew 5:5
The quality of meekness referred to in this beatitude is spiritual submission and obedience to Jesus.
Jesus demonstrated this by dying on the Cross for you. If you are a believer God is at work to crucify your self nature and cause you to live in oneness with Him.
You were not born with this attribute of meekness. It is given to you by the Holy Spirit in your journey with God.
The Christ follower does not need to boast about himself or his achievements.
He esteems others higher than himself.
He recognizes the sovereignty of God and understands he can do nothing without the help of God.
He is humble because he trusts in the promises of God. They are his safety net.
He walks by faith and is obedient to the voice of God.
He is continually seeking God out for wisdom and guidance.

He ceases from striving and rests in God.
The promise from Jesus is the meek will inherit the goodness of God in the land of the living.