In MRI, there is an "impossible triangle" formed by SNR, spatial resolution, and scan time. Improving any two inevitably comes at the expense of the third. High SNR and high resolution demand long scan times; short scans with high resolution suffer from low SNR; and achieving both high SNR and short scan times requires sacrificing spatial resolution.
I recently realized that life seems to follow a similar "impossible triangle" defined by money, time, and energy. In youth, we possess time and energy but lack money. In middle age, we gain money and energy but lose time. In old age, we may finally have time and money, yet no longer have the energy to fully enjoy them.
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