"Wear heart on sleeve" is an idiom that means to show one's true feelings openly and without any hesitation. The phrase implies that the person wearing their heart on their sleeve is being vulnerable and honest about their emotions, making it easy for others to read them.

The idiom "your guess is as good as mine" means that nobody knows something or nobody can predict the outcome of a situation. It's a way to express uncertainty and acknowledge that there is no definitive answer to a question or problem.

The idiom "every picture tells a story" refers to the idea that each image or photograph contains hidden messages or meaning beyond its surface level.

The idiom "go by the book" means to follow the rules or regulations strictly, without any deviation or flexibility. It also suggests that someone is not only following the written text but is also interpreting it correctly and applying it in practice.

The idiom "no man is an island" means that people cannot exist or thrive in isolation from others. It emphasizes the importance of social interaction, support, and community in our lives.