Theft and Larceny: Evidence of Past Acts of Theft

My question involves criminal law for the state of: Texas

In the code under Theft it says this phrase: (1) evidence that the actor has previously participated in recent transactions other than, but similar to, that which the prosecution is based is admissible for the purpose of showing knowledge or intent and the issues of knowledge or intent are raised by the actor's plea of not guilty.

What in the heck does this mean? Can someone dummy it down for me, or have it make sense?

Theft and Larceny: Evidence of Past Acts of Theft