Let us therefore make every effort to do what leads to peace and to mutual edification.
NIV
So let us then definitely aim for and eagerly pursue what makes for harmony and for mutual upbuilding (edification and development) of one another.
AMP
Let us therefore follow after the things which make for peace, and things wherewith one may edify another.
KJV
"I have the right to do anything," you say – but not everything is beneficial. "I have the right to do anything" – but not everything is constructive.
NIV
All things are legitimate [permissible--and we are free to do anything we please], but not all things are helpful (expedient, profitable, and wholesome). All things are legitimate, but not all things are constructive [to character] and edifying [to spiritual life].
AMP
All things are lawful for me, but all things are not expedient: all things are lawful for me, but all things edify not.
KJV
We should all please our neighbors for their good, to build them up.
NIV
Let each one of us make it a practice to please (make happy) his neighbor for his good and for his true welfare, to edify him [to strengthen him and build him up spiritually].
AMP
Let every one of us please his neighbour for his good to edification.
KJV
Those who speak in a tongue edify themselves, but those who prophesy edify the church.
NIV
He who speaks in a [strange] tongue edifies and improves himself, but he who prophesies [interpreting the divine will and purpose and teaching with inspiration] edifies and improves the church and promotes growth [in Christian wisdom, piety, holiness, and happiness].
AMP
He that speaketh in an unknown tongue edifieth himself; but he that prophesieth edifieth the church.
KJV