The yolk is the heart of the egg, so tradition reads it as the core of a matter, nourishment and life energy. A bright yolk is seen as vitality and inner richness.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.