The Prophet (Sall Allahu Alayhi Wasallam) said: "When a person tells a lie, the bad smell that comes out of the lie keeps the angels one mile away." [Tirmidhi]
Keep in mind that you are pushing the angels that protect you away from you when you tell lies. Many are the lies that we are aware of telling. Yet how many more lies do we tell without even considering them as lies, so far away are we from having Islamic morals.
Once a Sahaabah called her son in telling him that she wanted to give him something. The Prophet (Sall Allahu Alayhi Wasallam) then asked her if she had in fact given anything to her son. She replied that she had given him a date. The Prophet (Sall Allahu Alayhi Wasallam) told her that if she had not given him anything she would have been recorded as lying to her child.
We need to be very careful not to say anything that we are not committed on fulfilling, for all lies are written down. A small lie is noted down as a small lie and a big lie is written down as a big lie. As we are careful to keep our breath pleasant and not offend people with it, shouldn’t we be even more careful not to offend and chase away the angels that protect us?