While the Jewish people were in exile in Bavel, Hashem instructed the prophet Yechezkel to teach them the details of the design of the Beis Hamikdash. Yechezkel challenged Hashem, “how are they capable of making the Beis Hamikdash while they are in exile? First let them leave their exile and then I will tell them!” Hashem responded “just because My children are in exile should the construction of My home be neglected?”
Exile represents a state of spiritual darkness and distance from Hashem. When we feel disconnected we can feel that we are not capable or worthy of serving Hashem through davening or learning. “How is it possible for me to be involved in making a resting place for Hashem when I am in exile?”
But Hashem says - keep building my House although you are not in a great place. When you are feeling low, or far from holiness, you can still connect with Hashem.