Learn Italian: Se sei sempre oberato, perderai sicuramente la lucidità. - If you are always swamped, you will definitely lose your clarity.

You could say Sei sempre così oberato da perdere sicuramente la lucidità (You are always so swamped that you will definitely lose your clarity). This uses the implicit consecutive clause così + [adjective] + da + [infinitive] because the subject (you) is the same in both halves of the sentence.

What is the difference between lucidità and chiarezza if both can translate to 'clarity'?

Lucidità specifically refers to mental clarity, sharpness, or being clear-headed. If you are talking about the objective clarity of an explanation, a picture, or a concept, you would use chiarezza instead.

Why does this sentence mix the present tense (sei) and the future tense (perderai)?

This is a standard first conditional sentence expressing a highly likely possibility. Just like in English, Italian often uses the present tense in the se (if) clause and the future tense for the result. However, unlike English, Italian also allows you to use the future tense in both halves: Se sarai sempre oberato, perderai sicuramente la lucidità.

Is oberato used for being physically crushed or just for being busy?