Both sentences are absolutely 100% correct, both from a logical and a grammatical point of view. One might be tempted to reject the present tense "we make" since the decisions happen before the future happens. That view is mistaken. Which is the better choice depends upon the meaning of "we". Before choosing between "make" and "made", you must decide to whom "we" refers. Does it refer to the people who are in the room with you right now as you say these words? Or, does it refer to all people who have ever lived or who ever will live? In the former case, "made" is the best choice. In the latter case, "make" is superior. The sentence "All decisions we make in the past..." is timeless. It is not about the present, past, or future. It is about human beings. It is about ourselves. It is about people who lived long ago. It is about people who have not yet been born. The correctness of "we make" becomes even more obvious if you replace "we" with "one": "All decisions one makes in the past lead one into the future."

The first is simply wrong grammar. The second is very slang, and wrong grammar at least in a formal context. The totally correct version would be: "All decisions WE'VE MADE in the past inevitably lead us into the future" OR "All THE decisions WE'VE MADE in the past inevitably lead us into the future" OR "All OF THE decisions WE'VE MADE in the past inevitably lead us into the future" OR "All OF THE decisions WE'VE MADE in the past WILL inevitably lead us into the future" All of the above options are correct - take your pick, depending how precise & wordy you want to be. "Stay focus" is wrong grammar. "Stay focused" is fine.

"All decisions we make in the past inevitably lead us into the future." Is incorrect. The verb tense is inconsistent here. "Make" is present tense, while "in the past" refers to a past action. You would need to change "make" to "made" to match the past time frame.

1. “All decisions we make in the past inevitably lead us into the future” vs. “All decisions we made in the past inevitably lead us into the future.” Correct Version: “All decisions we made in the past inevitably lead us into the future.” Reasoning: The second sentence is correct because it uses the past tense "made," which aligns with "in the past." The first sentence is incorrect because "make" is present tense and doesn't match with "in the past." Improved Version: “All decisions we made in the past have inevitably led us into the future.” Reasoning: This version is even better because it uses the present perfect tense "have led," which connects past actions with their impact on the present and future.

The second question is the easier of the two. You want to say "stay focused." "Stay focus" makes no sense. When you say "stay focused", you're using the past participle form of the verb "focus" as an adjective. Regarding your first question: I would recommend that you use the Present Perfect tense because you're talking about past actions that are affecting the present. Also, you should use the definite article "the" before "decisions" because you're talking about specific decisions. So I would recommend that you say, "All of the decisions that we have made in the past inevitably lead us into the future." "Of" and "that" are both optional in that construction, but I would recommend that you include them since the statement seems to be formal in tone.