Likeminded (ισοψυχον). Old, but very rare adjective (ισοσ, ψυχη), like ισοτιμος in 2. Peter 1:1. Only here in N.T. Likeminded with Timothy, not with Paul.

Truly (γνησιως). "Genuinely." Old adverb, only here in N.T., from γνησιος (Philippians 4:3), legitimate birth, not spurious.