A. There are two kinds Samadhi: one before enlightenment and one after enlightenment.
The former is the state of mind that usually occurs during practice when we are fully focused on the question. Your mind is then very stable and comfortable, and you are not conscious of time passing. You feel as if you yourself were the question and separate from reality. In brief, your meditation practice is going in an ideal way, and is close to the final goal.
The latter is the state of mind we have every day after realising what we are when our body is not us, that is enlightenment. Here you are truth itself, eternity itself and perfection itself, and so no words can be applied to it. You feel oneness with the whole universe and know that everything you can feel is made by no other than your discriminating mind. You can see things in both ways; emptiness and form at the same time. In other words, you know that all illusions are not different from the truth.
All writing ©Boo Ahm. All images ©Simon Hathaway