From time to time, situation to situation, the Gods give more or less "instant feedback".
If they don't give any, you will only feel the remaining energy of the runes, how your surrounding tuned into these runes, and you feel that you tuned into the God/dess, if you meditate on their sigils afterwards.
And plus, you can feel their feedback if they give, such as a blissful energy / feeling / thought.
It could also be that they always deliver some amount of energy back to you. Me personally, I do not always "feel" the rituals but most of the times I do see the effects (especially the last few months). This could be a change in my thinking, perception, feelings, etc. Mostly, I'm more encouraged and eager to complete my Satanic duties.
These rituals can really transform the individual. It is not always the instant blessing one should seek in them, but to connect yourself with the Gods.