The first doorway (or chakra) ...

The first doorway (or chakra) is what I call in the book, the Doorway of Safety. This doorway relates to feeling safe in life and being present in the here and now. It's only when we are really grounded and safe that we're able to relax and open up our hearts.
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 Marci Shimoff

Quotes from the same author

The third doorway is the Doorway of Unconditional Self-love, which corresponds to the energy center located in the solar plexus area. As I said earlier, the key to feeling love and living in love is having self-love. I mean real unconditional self-love, not "I love myself because I'm a good wife" or "I love myself because I do a good job at work" or "I love myself because I look a particular way." It's because I love myself no matter what. That's where our real power lies, in the ability to love ourselves unconditionally.
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 Marci Shimoff
The fourth doorway is the Doorway of Openness located in our heart center. It has to do with being open to both giving and receiving love. It's not just about being able to give, but it's also about the ability to be open to receive. There's a certain vulnerability in receiving. When we truly take in and appreciate all of the gifts of life, then our hearts are truly open in love.
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 Marci Shimoff
When you forgive, you heal your own anger and hurt and are able to let love lead again. It's like spring cleaning for your heart.
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 Marci Shimoff
Taking ownership of your happiness has two aspects: Accepting that being happy is up to you and that you have the ability and power to be happier by changing your habits. Taking "response-ability": responding to all the events in your life in a way that supports your happiness.
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 Marci Shimoff
When we're feeling fully alive, we're able to fully feel love. This doorway also relates to feeling our feelings fully. Not suppressing our feelings of anger, sadness or grief but allowing them to be felt. What's amazing is that when those feelings are felt, they actually dissolve into love.
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 Marci Shimoff