The Lord gave us this model prayer

(sometimes called “the Lord’s prayer”, however, that prayer is found in John 17).  The only reason I mention this is that Christ Jesus was sinless and had no personal need to pray "forgive us our trespasses ..."

 When we seek understanding of each element in this prayer, and apply the understanding, the gates of hell shall not prevail against us.

And when thou prayest, 
thou shalt not be as the hypocrites are: for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward. But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door,  pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly.

But when ye pray, use not vain repetitions, as the heathen do: for they think that they shall be heard for their much speaking. Be not ye therefore like unto them: for your Father knoweth what things ye have need of, 
before ye ask him. Matthew 6: 5-8

After this manner therefore pray ye:
Our Father which art in heaven, Hallowed be thy name. Thy kingdom come. Thy will be done in earth, as it is in heaven. Give us this day our daily bread. And forgive us our debts,  as we forgive our debtors. And lead us not into temptation, but deliver us from evil: For thine is 
the kingdom, and the power, and the glory, 
forever. Amen. Matthew 6: 9-13

For if ye forgive men their trespasses, 
your heavenly Father will also forgive you: But if ye forgive not men their trespasses,  neither will your Father forgive your trespasses. 
Matthew 6:14-15

[ Note 1:  model \Mod"el\, n.

  1. A miniature representation of a thing, with the several  parts in due proportion; sometimes, a facsimile of the same size.

  2. Something intended to serve, or that may serve, as a pattern of something to be made; a material representation or embodiment of an ideal; sometimes, a drawing; a plan; as, the clay model of a   sculpture; the inventor's model of a machine.

  3. Anything which serves, or may serve, as an example for imitation; as, a government formed on the  model of the American constitution; a model of eloquence,  virtue, or behavior.

  4. That by which a thing is to be measured; standard.

     Source: Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.   

  model \Mod"el\, a. Suitable to be taken as a model or pattern; as, a model house; a model husband. ]