It's impossible to definitively say what the two "strongest" aspects of existence are, as this is a subjective question. However, here are two possibilities that could be considered strong aspects of existence, depending on your perspective:

1. The Power of Connection: This could be considered strong because it highlights the inherent interconnectedness of all things. This includes:

* Human connection: Love, friendship, family, community. These relationships provide us with purpose, meaning, and support.

* Connection to the natural world: Our dependence on the environment, the beauty and awe we experience in nature, the sense of belonging we feel in the natural world.

* Connection to something larger than ourselves: Whether it's a spiritual belief, a shared sense of humanity, or a commitment to a cause, feeling connected to something bigger can provide us with strength and motivation.

2. The Will to Survive: This is a fundamental aspect of life, driving us to overcome challenges, adapt to change, and persevere even in the face of adversity. It is a testament to the inherent resilience of life and the extraordinary lengths to which we can go to preserve our existence.

Ultimately, the "strongest" aspects of existence are subjective and depend on your individual values and experiences. Both connection and the will to survive are powerful forces that contribute to the richness and complexity of our existence.