Firstly, let's consider the concept of context-dependent memory. This phenomenon suggests that our memories are influenced by the context in which they were formed. For instance, if you recall a happy childhood memory while standing on a beach, your brain will associate the feeling of happiness with the sensory cues of the beach (e.g., the sound of waves, smell of saltwater). This association can shape our emotional responses to environments and even influence our motivation and ambition.

Nostalgia plays a significant role in this process. When we're exposed to familiar environments or objects from our past, it triggers nostalgia – a sentimental longing for a past time or place. Nostalgia has been shown to have numerous benefits, including increased motivation, improved mood, and enhanced creativity. This is because nostalgia can provide a sense of comfort, security, and familiarity, which can be particularly important during times of uncertainty or stress.

In terms of surroundings specifically influencing mental states, several factors come into play:

1. Lighting: Natural light exposure has been linked to improved mood, reduced symptoms of depression, and increased alertness.

2. Color schemes: Certain colors, such as blue and green, have been shown to have a calming effect on the mind, while warm colors like orange and yellow can increase energy levels.

3. Noise levels: Excessive noise can lead to feelings of anxiety and stress, while peaceful environments with minimal distractions can promote relaxation.

4. Temperature: A comfortable temperature range (around 68-72°F) can improve focus and productivity, while extreme temperatures can cause discomfort and decreased motivation.

5. Layout and organization: Cluttered or disorganized spaces can contribute to feelings of overwhelm and anxiety, while well-organized environments can promote a sense of control and calmness.

In conclusion, our surroundings have a profound impact on our mental states. By understanding how factors like context-dependent memory, nostalgia, lighting, color schemes, noise levels, temperature, and layout influence our emotions, we can take steps to create environments that support our motivation, ambition, and overall well-being.