These Clear Quartz Altar Crystals are designed to go on your altar to aid in your spell casting and magickal works. This includes meditations as a focal point on your intention.
The intention each design contains will be whatever the image on it represents to you. For example, I use the crystal with the sword image on it to focus my intent when cutting away or removing anything from my life that no longer serves me, or the moon and star crystal to aid in promoting a nice restful sleep.
How you choose to use them is completely up to you and your interpretation of the symbols.