Being a Christian requires believing in the Lord Jesus Christ as Saviour and confessing Him as Lord.
Christianism is a state of being where the Words of Christ and His Gospel have transformed one's Life.
Christianism and Discipleship are the same.
Many people have believed on the Lord Jesus Christ who have not allowed Him to Transform their lives.
They have not fully moved into Christianism. They are DoubleMinded.
As James said, doublemindedness is instability and weakness. Jam 1:6-8
Christianism is 100% commitment to the Word and 100% submission to the HolySpirit.
Christianism manifests Power and Authority.
Jesus commanded us to go out and make Disciples - to impart Christianism.
The world is suffering in wait for a manifestation of Christianism - the sons of God. Mat 5:13-15 Rom 8:19