The parable of the Pharisee and the tax collector shows that posture matters. Next to constancy, effective prayer requires humility. The contrast between the pride of the Pharisee and the lowliness of the tax collector is stark.
We are entitled to nothing yet God gives us everything. When we acknowledge this, our hearts are full of humility and gratitude.
O gracious God, help me to bow down low before your kindness. May I accept the gift of your Love with grace and gratitude.