How do we know if we are in union with Christ?

Determining whether one is in union with Christ can be identified through specific signs in a believer's life. As outlined in 1 Thessalonians 1:3, Paul mentions the work of faith, labor of love, and patience of hope as evidence of their election and union with God. Faith works as a reception of Christ, implying a personal trust and acceptance that reflects a genuine relationship with Him (John 1:12). Furthermore, love for the brethren and a desire to obey God's commandments signify a true believer's heart which is transformed by the Holy Spirit. If these evidences are present, they serve to confirm one's position in Christ.