I am going to jump in here and define depression as the flow of life through our soul, heart and out into life. Our inner man is nurtured and maintained by this flow of life and love.
The source of the flow is transcendent - beyond what we see and feel - and this flow must flow through us and out to others in order for us to benefit from that flow. That is why Jesus said we must forgive if we are to experience forgiveness ourselves.
Depression is the disease that happens when the flow is blocked, the river of life is dammed up. With no flow of life energy, we feel depressed. Instead of a stream flowing with fresh water, we become a swamp with stagnant water.
Now if this is true and makes sense to you then you need to think about how to unblock the flow of life. Let me know if this does make sense and gives you any answers.
The flow of life means to love others unselfishly, to give generously to others, to share the blessings of life with others - not being stingy, selfish withholding.
Tesla is an example of a very humble man who pursued his love of inventions with passion and with total unselfishness, generosity and sharing with others. His desire to offer ‘free energy’ to all was blocked by mean selfish bankers who had no such motives.
I now believe that Tesla owes his great creativity to his willingness to give away what he discovered. The source of his imagination and intuition seems to reward that unselfish generous spirit.
Those depressed need to enter the flow of life by opening up to blessing others, opening up to the blessings of life, developing gratitude and enjoying loving unselfishly and audaciously. Embrace life.

I am writing a book on the healing of the Inner Child. I Believe the freeing and healing of our Inner child is important. Here are some reasons why.

You can get by without a free Inner Child and miss out when it comes to love and intimacy. You can make it through without a healed Inner Child but will miss out on a level of joy, and creativity. Freeing your Inner Child is about enjoying more of life, love, and God by finding healing and freedom of your Inner Child.

If your Inner Child is not free and healthy you are going to be anxious or depressed. If your Inner Child is freed, you will begin to experience more abundant life, vital energy, and less depression. I mean it, your repressed Inner Child is a primary cause of depression and anxiety and panic attacks.

Becoming ‘like a little child’ opens your heart to receive more of God’s love, be filled with the radiant light of God’s presence and enjoy greater access to divine creativity. You begin celebrating God’s presence everywhere and living in a stream of joy.

Freeing your Inner Child is remembering who you are, discovering your deepest heartfelt desires and removing the veils on your eyes to see life more clearly and be fully present in each moment of your life.

Your Inner Child allows you to feel life more deeply and have more active intuition (gut instinct).

Others will notice as your Inner Child gets healed. Many will sense that you are more present and make eye contact with greater ease. Some will sense that your spirit is getting brighter.

As your heart breaks open, your tears will flow more easily. It is almost that you are experiencing the heart of God. At those times you will find that the Holy Spirit flows through your prayers with great ease.
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That means we should be willing to go to great lengths to heal and free out Inner Child.