In general, it's meaning is simple and intuitive - the more similar a person is to oneself, the easier it is to get to know or understand that person.
A second but related meaning of the phrase is knowing through analogy. This usage goes back at least to the Presocratics, especially Empedocles.
Though it might seem to be used as a substitute for the phrase, "it takes one to know one", "like is known by like" is not normally used pejoratively like the former is. Another difference is that "it takes one to know one" does not seem to allow for degrees of likeness/knowledge.
The concept of "like is known by like" was a major philosophical doctrine at least as early as the 5th century B.C.E. Pythagoras taught that the extent or depth of our knowledge of the divine depends on us being like the divine, or assimilating to the divine. The idea was that to the degree that we have knowledge of the divine, we must have changed our own character from human to divine.
The doctrine of "like is known by like" was quite influential on later philosophical and religious schools of thought, especially Neoplatonism.
One might also apply the phrase in ethics without referring to other minds (divine or otherwise), to mean "being good enables or helps one to know the good". The idea that virtue somehow illuminates moral truth suggests that more virtuous people have a greater ability to know moral truth.
If one knows what is good, that person will not commit evil acts.
Conspiring means to make plans that no one else knows about. It can also mean that you and others are working together to make plans that is to be told to no one else.
the name sahiba means loved by one ..... so one who knows a sahiba shuld love her;)
like anybody knows.
It is possible that what Homer means is that it is better to have knowledge and be poor because of it, then be a rich fool who knows nothing.
it means that she knows you like/are in love with her
It means he knows you like him. It's how he comes across that matters.
If a ex is horrible and mean to you it means she either knows someone who likes you and sh doesn't like it, or she likes you. No it is not
He likes you back!! He knows and if he flirts he is head over heels for you!!
It means he likes you back, or he knows you like him, so he tells his friend.
That she probably doesn't like you back.
teasing
She might not be interested in you. Just because she knows you like her doesn't mean she will like you back.
it means he has a pet rat
they don't like you but willing to date you.
Most likely, no. Just because YOU like him, doesn't mean he has to like you back. He told you he didn't like you. He knows that you like him, and if he did like you back, he would've asked you out by now.
It may mean that he knows you like him and he likes you back or maybe he doesnt no you like him, but he likes you anyway.