1- Reptiles in dreams link with our basic and instinctive reactions and responses. WTien there is a basic urge such as a need for food, sex, etc. - we sometimes cannot face it full on, but will symbolise it as a reptile.
2- When there is a need to understand why we do things, we first need to control our basic drives. Many reptilian dreams arc about control or management. Control of a crocodile would suggest some fear of an aggressive nature. Feeding a lizard or stroking a snake can be very simply interpreted.
3- With understanding of the basic urges and the way to manage them we can create a firm foundation. From there we can progress spiritually.