As to the aridity you are suffering from, it seems to me our Lord is treating you like someone He considers strong: He wants to test you and see if you love Him as much at times of aridity as when He sends you consolations. I think this is a very great favor for God to show you.
God gave us faculties for our use; each of them will receive its proper reward. Then do not let us try to charm them to sleep, but permit them to do their work until divinely called to something higher.
Granting that we are always in the presence of God, yet it seems to me that those who pray are in His presence in a very different sense; for they, as it were, see that He is looking upon them, while others may go for days on end without even once recollecting that God sees them.
Let him never cease from prayer who has once begun it, be his life ever so wicked, for prayer is the way to amend it, and without prayer such amendment will be much more difficult.