"Let the high praises of God be in their mouth, and a two-edged sword in their hand." Psalm 149:6
Our personalities will cause us to gravitate toward one or the other. The former without the latter is a person who rejoices in the Lord but never stands for the truth. The latter without the former is a person who always stands for the truth but has no joy. If these two seem irreconcilable simply read the life of the Lord Jesus Christ.