If we use God's Word we 'preach and teach'
There are a variety of ways we are told to speak to one another and examples we are given in the scriptures:
In 1Thessalonians, Paul says we are to [i]comfort[/i] ourselves together, and [i]edify[/i] one another. The greek words are defined this way:
from Strong's Greek Dictionary
[b]comfort[/b]
G3870
παρακαλέω
parakaleō
par-ak-al-eh'-o
From G3844 and G2564; to call near, that is, invite, invoke (by imploration, hortation or consolation): - beseech, call for, (be of good) comfort, desire, (give) exhort (-ation), intreat, pray.
[b]edify[/b]
G3618
οἰκοδομέω
oikodomeō
oy-kod-om-eh'-o
From the same as G3619; to be a house builder, that is, construct or (figuratively) confirm: - (be in) build (-er, -ing, up), edify, embolden.
Paul goes on to [i]beseech[/i] the brethren, and to [i]exhort[/i] them, saying that they should
[i]warn[/i](noutheteōG3560) those that are unruly
[i]comfort[/i](paramutheomaiG3888) those that are feebleminded
[i]support[/i](antechomaiG472) those that are weak
and be patient toward all.
That doesn't nescessarily mean it must be done only, and all, with words.
[i]edited to correct an omission in the last sentence[/i]