If you live in unison with your true Atman or Spirit, if you always keep yourself in touch with God in you, with your own Self or Atman, you are inspired all the time. What is wrong with you is that your mind comes in contact with earthly magnets on all sides, worldly attachments which magnetize you and put you out of order, you are no longer in running order, deranged.
If you are not inspired today, the sole reason is that you do not keep yourself isolated, or insulated enough. You allow worldly objects to magnetize, to hypnotize you, you allow them to play foul and fast with you. If you want to regain your original powers and inspiration, keep yourself insulated, isolated for a while.
Bury yourself in the Reality, in Divinity, in God, in the true Atman. Keep yourself buried in the Spirit, in the Truth. Live alone for a time, set apart sometime of your day for keeping in touch with the Reality; merge yourself, bury yourself in God. Do that and the spoiling magnetism and wrong hypnotism that you have got from these worldly objects will leave you, your mind will be running in order again. You will be again inspired.
Swami Rama Tirtha