My mother used the word, "spiffy" a lot. It is not used much today. It means "really, really good," especially in the "very presentable" sense. Here's the question, "Do we have to be spiffy for God?" By that, I mean, "Do we have to clean up nice before God wants to listen to us or find us worthy of his time?"
The answer, I believe, is an unqualified, "No!" The story of the Loving Father (Prodigal Son) in Luke 15 points out that the "highest good" is a relationship of father and child. Everything else is "details." The father will give up everything, including the lecture parents give and his own reputation. The psalmist often comes across as complaining, vindictive and somewhat whiney. And these Psalms are prayers that stood the test of time.
Stand before God, your Father, today and know that, no mater what you have done, are doing or will do, he is smiling back and loves you more than you will ever know. Conditional? Don't bet on it!