And it has been declared
‘Whoever divorces his wife, will give her a divorce certificate’.

But I say to you that every man who divorces his wife,
except for a matter of sexual immorality 
causes her to be adulterous
and whoever marries a divorcee commits adultery. 

Again  you all  have heard that it has been declared to our ancestors:
‘You will not swear falsely,, but keep your oaths to the Lord.’

But I say to you do not make oaths at all.
Neither by the heavens, because it is the throne of God
nor  the earth, because it is the footstool of his feet
nor  towards Jerusalem because it is the city of the great King;
neither swear by your head, because you cannot make one hair white or black.. 

Your word will be ‘yes, yes’ or ‘no no’. 
More than this is from the Evil One.

God, give me grace to accept with serenity
the things that cannot be changed,
Courage to change the things
which should be changed,
and the Wisdom to distinguish
the one from the other.

Living one day at a time,
Enjoying one moment at a time,
Accepting hardship as a pathway to peace,
Taking, as Jesus did,
This sinful world as it is,
Not as I would have it,
Trusting that You will make all things right,
If I surrender to Your will,
So that I may be reasonably happy in this life,
And supremely happy with You forever in the next.

Amen.