Based on Bhagavad Gita Chapter 14, Text 06
Some people ask: “Krishna resides in our heart and is available at all times. Then why emphasize morning for connecting with him?”
Because we are best available in the morning, answers Gita wisdom.
Though Krishna is always available in our hearts, we can connect with him only by turning inwards. Doing that is not easy, given the fact that our lives are so externally, materially directed. That’s why we need to choose the time when the difficulty level is the least. That time is morning because then all the three levels of our being — physical, mental and spiritual — are best tuned for the inner exploration. We are:
1. Uncluttered physically: As the world has not yet started off on its daily round of passionate activities, one thing after another is not rushing at us uncontrollably.
2. Fresh mentally: As we haven’t yet had to deal with daily life’s routine stresses, we don’t feel irritated or exhausted; our mental energy is still intact.
3. Receptive spiritually: The natural vibrations in the morning are in the mode of goodness, which, the Bhagavad-gita (14.06) indicates, is the most illuminating and purifying of all the modes of material nature. Moreover, the early morning hours, called brahma-muhurta, are surcharged with spiritually potent vibrations. These two supportive factors make us most spiritually receptive in the morning.
Read More – http://www.gitadaily.com/2012/11/18/why-is-morning-the-best-time-for-spiritual-activities/