'Weighty' in the Bible

for they say, “His letters are weighty and forceful and impressive, but his personal presence is unimpressive and his speech contemptible [of no account].”

And great, we confess, is the mystery [the hidden truth] of godliness:He (Jesus Christ) who was revealed in human flesh,Was justified and vindicated in the Spirit,Seen by angels,Preached among the nations,Believed on in the world,Taken up in glory.