Meditation means when our thoughts go deeply about God and his words in our mind. Mediation is not about clearing the mind. As a Christian we have to study the bible and stay calm to think about his words which we have read. Believers should take their time to think about the words of God which will change their life. Christians also get closer to God through praying and meditation.
“But his delight is in the law of the Lord; and in his law doth he meditate day and night” (Psalm 1:2).
The Bibles teaches that good action and obedience should be obtained from meditation. During mediation God can show us about things we can't see with physical eye. This kind of meditation brings peace to the heart and helps believers live in a way that pleases God.
God told Joshua, “This book of the law shall not depart out of thy mouth; but thou shalt meditate therein day and night” (Joshua 1:8).