en_tn_lite_do_not_use/jhn/15/27.md

You also must testify

Here "testify" means to tell others about Jesus. Alternate translation: "You also must tell everyone what you know about me" (See: rc://en/ta/man/jit/figs-explicit)

You also must

Some English versions of the Bible translate "must" as "will." Alternate translation: "You also will"

the beginning

Here the "beginning" is a metonym that means the first days of Jesus's ministry. Alternate translation: "from the very first days when I began teaching the people and doing miracles" (See: rc://en/ta/man/jit/figs-metonymy)