The statement "The strength given by my mother is bigger than the cosmic energy in this cosmos" is a comparison between the strength provided by the mother and cosmic energy. This comparison does not use "like" or "as," which are typical indicators of a simile. Instead, it directly equates one concept with another, making it a metaphor. Metaphors show how two things that are not alike in most ways can be similar in a significant way, providing a deeper understanding or new insight into an idea.