NET

2 not to be easily shaken from your composure or disturbed by any kind of spirit or message or letter allegedly from us, to the effect that the day of the Lord is already here.

Darby

2 that ye be not soon shaken in mind^D8811, nor troubled, neither by spirit, nor by word, nor by letter, as [if it were] by us, as that the day of the Lord is present.

Darby Bible Notes

mind - Or 'shaken from a steady and soberly judging mind.'

KJV

2 That ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand.

Strong's

2 That ^G1519 ye^G5209 be^G4531 not^G3361 soon^G5030 shaken^G4531 in^G575 mind^G3563, or^G3383 be troubled^G2360, neither^G3383 by^G1223 spirit^G4151, nor^G3383 by^G1223 word^G3056, nor^G3383 by^G1223 letter^G1992 as^G5613 from^G1223 us^G2257, as^G5613 that^G3754 the day^G2250 of Christ^G5547 is at hand^G1764.