If you lay all these instructions before the brethren, you will be a worthy steward and a good minister of Christ Jesus, ever nourishing your own self on the truths of the faith and of the good [Christian] instruction which you have closely followed. 1 Timothy 4:6 (AMPC)
Our call is Christ living in and expressing himself through us.
This is accomplished when in our daily walk, conduct, and work we are influenced by the knowledge of Christ also called the truths of the Faith.
Fulfilling your call begins with hearing and receiving the truths of the Faith, being thoroughly instructed and established in them, then walking in them. Fulfilling our call is fully realized when we pass on to others the truths we’ve been instructed in and walked in.
In your daily walk, life, and conduct show Christ to others and help them live the Christ life – you would then have fulfilled your call.