Hebrews 3:12-13

Take care, brothers and sisters, that there not be in any one of you a wicked, unbelieving heart (which refuses to trust and rely on the Lord, a heart) that turns away from the living God. But continually encourage one another every day, as long as it is called “Today” so that none of you are hardened (into settled rebellion) by the deceitfulness of sin. 

It is important that we encourage each other in the Lord.  That we may help support each other in the faith so we don’t harden our hearts in discouragement and sin.  When we build each other up as we help each other walk in faith and keep away from sin.  We are called the body of the church and are meant to support and help each other.