Throughout the Great Lenten season, we Orthodox pray that God will take from us the spirit of idle talk. We also pray that God will set a guard before our mouths. We are asking God to help us control our talking for we know through our words we often wound others, cause grief rather than bring peace to others, entice others to join in evil thoughts, gossip about others to their detriment. We need Gods help to control out tongues so that our words can build up others and heal others and encourage others and support others. St. John Chrysostom tells us that God has put within each of us the ability to reason and we are to use that reason to control our mouths and our talking.
Aware of this the inspired author also said, Set a guard on my mouth, Lord, and a door for encircling my lips. Now, what other guard is there than reason looming ominously, holding in its hands the fire destined to incinerate those idly using the mouth? Place this doorkeeper and guard that threatens your conscious, and it will never open this door at the wrong time, but only at the right time and for profit and goods beyond counting. Hence someone said, ‘Always remember your last end, and you will never sin:’ do you see how this person installed the faculty of reason? I presented it as even more ominous, however, speaking of it as having hands. If this happens, nothing evil will be generated in the mind. Along with this bring to the fore as well the one who says, ‘On the day of judgment you will give an account for every idle word.’
Consider that death also came on the scene: if the woman had not said it to the serpent what she said, if she had not heeded his words, she would have sustained no harm, she would not have given anything to her husband, he would not have eaten. I say this, blaming not tongue and mouth – perish the thought – but untimely use of them, which happens because of negligence in reasoning.”
(St. John Chrysostom, Commentary on the Psalms, pp 285-286)