It is possible that we can have more Grace

The grace of our Heavenly Father comes in increasing measure.  In other words, it is possible to add more grace on top of the grace we already have.  Then we can add more grace to that.  It is possible to increase in grace until we are walking in the fullness of grace.  We activate the grace of God in our lives by walking in faith.  But we can also diminish God's grace in our lives by walking in pride or by being prideful.  Pride comes in when we are conceited or we become high-minded.  A prideful person is someone who becomes arrogant or haughty.  It's a person who has too high opinion of themselves.  It says in James 4:6 (NKJV)
6 But He gives more grace. Therefore He says: “God resists the proud, But gives grace to the humble.”.  So if we don't want to put up resistance to more of God's grace in our life, we will strive to be more humble and operate out of the spirit of humility.