Ramadan is the month in which Allah Almighty forgives humans and those sinful persons who neglected the orders of Allah. This month means to be forgiveness and those who forgive other human in the spiritual month Allah has many reward for them and apply mercy on them.
Once the holy Prophet(PBUH) said Musa, the son of Imran once asked, "Oh my Lord! Who is the most honorable of Your servants? And He replied, the person who forgives even when he is in a position of power" (Baihaqi). Peace and blessings be upon the Prophet.
So from this hadith we can imagine what forgiveness mean in the holy month of Ramadan, remember those time when you get in to argument with some one and when you know that your position is right but you have been neglected and insulted with rudeness and then you chose to hold a grudge, after all you have a right to, how can they treat you like this, why would you forgive? You were right on your saying and on your position so why should you forgive those who insulted you.
That’s what you would say and you may be right and you may be in position of power mentioned in hadith above, but you need to know that forgiving other (apart from those who hurt one physically) you should forgive them to become close to Allah and his mercy . How can we move up the ladder of spiritual development when we hold bitterness and anger towards another person? While we may have been in the right, is it worth sacrificing our energy on a grudge instead of on growth?
Is there not something strange about asking for God's forgiveness of our sins while withholding our forgiveness from someone who has hurt us? So remember one of the most important part of Ramadan is forging fellow human beings in the holy month so Allah forgive you for your mistake and sin which you have done, according to Prophet's hadith Ramadan is a month whose beginning is Mercy, whose middle is Forgiveness and whose end is freedom from the Hellfire. This makes it a great time to ask God for His Forgiveness. It's also a wonderful time to open our hearts and cleanse them of grudges and bitterness by forgiving others.
We have to understand that the part of getting Allah and his mercy is always paved with tests and difficulty no one can gain spiritual uplifting without proving their mettle this practice include facing all type of hardship including injustice at the hands of others.