'Joining' in the Bible

Immediately they left their nets and followed Him [becoming His disciples, believing and trusting in Him and following His example].

Jesus called the crowd together with His disciples, and said to them, “If anyone wishes to follow Me [as My disciple], he must deny himself [set aside selfish interests], and take up his cross [expressing a willingness to endure whatever may come] and follow Me [believing in Me, conforming to My example in living and, if need be, suffering or perhaps dying because of faith in Me].