Chasidut zu Ejchah 3:23

One needs to guard one's mouth and tongue with regard to all speech. Even in terms of permitted speech our blessed sages were strict, as they said (Berachot 14a) that one should not even say hello to a person, since even this is destructive before the morning prayer. It is known that the world was created through thought, speech and action. Thought is the most primary, and speech is a branch of thought, and action is a branch of speech. So too, when a person wakes up from their sleep and becomes a new creature, as it is written (Eichah 3:23) "Renewed every morning" - if one begins by speaking permitted speech, and all the more so that which is not permitted! - even if one continues by praying and studies Torah, everything branches out from this first speech-act. Just as speech is a branch of thought and inferior to it, so too is the second speech-act to the first, as it says in the Zohar 2:83a and in the writings of Isaac Luria on respecting one's older brother, since the eldest brother takes the principal share and the other siblings are continuations from him. So too here, and therefore one should be careful to sanctify one's first speech-act, purifying one's first thought that it cleave to holiness so that it draws towards it all subsequent acts of speech. Afterwards, standing in prayer with the joy of performing a commandment, just as one's speech and thought were sanctified in this way, one's prayer will surely be answered.