What is the difference between true self and I AM?
They both are same. I AM is the Aham or the True Self of the individual existence.
The pulsation of I AM within human consciousness is considered as the first and last expression of its existence. It is also the only continuous pulsation that maintains the human consciousness. The natural pulsations of Soham and Hamsa form the basis for the existential human consciousness. Soham means I AM THAT and Hamsa means THAT is I AM.
It is the fundamental expression of Atman or the one’s own soul. This pulsation starts with I AM and ends with I AM THAT, only to come back as THAT I AM; it is an evolution of pulsation. The entire universe is nothing but just a pulsation.
Almost all the religions of the world strongly affirm the importance of I AM.
For example: In Sanathana Dharma, the Mahāvākya like Aham Brahmasmi, Tat Tvam Asi, Ayam atma brahma, and many more like them convey the importance of Atman/True Self or the I AM pulsations.
God said to Moses, “I AM WHO I AM (Ehyeh-Asher-Ehyeh). This is what you are to say to the Israelites: ‘I AM has sent me to you.” — (Exodus 3:14)
“I AM the LORD; that is my name! I will not yield my glory to another or my praise to idols.” – Isaiah 42:8
God’s name “I AM” is the key to understanding his name Yahweh or Jehovah. People thought that if you pronounced God’s name properly, you could do miracles – so they stopped saying it out loud and forgot how to. But the importance is not how to pronounce it – it is what it means. And I AM is the key.