Should you trust in God, but also make your own efforts to get your needs fulfilled? Or should one sit back and relax and depend on God to do everything for you? This does not seem like a hard question. Even in the Torah, we find working for a living is a good thing. כמו שנכרתה ברית על התורה כן נכרתה ברית על המלאכה. And this seems to be the approach of the חובות הלבבות.
The Sages in the Talmud seem to say otherwise. The רבנן [the students in the local beit midrash--learning hall] did not know what this verse in Mishlei [Proverbs] means (chapter 3: verse 5) בטח בהשם בכל לבך ואל בינתך אל תשען "Trust in God with all your heart, and do not depend on your own intellect." One day Raba Bar Bar Chana was walking with a merchant, and he was carrying a heavy bag. The merchant said to him, "Take your burden יהבך, and put it on my camel." [Tractate Rosh HaShanah page 26 side b].
Elijah from Vilnius (The Gra) said that it does not mean the merchant understood the meaning of the word יהבך when no one else did. Rather, they thought one should trust in God, but also go around getting his needs met. So that caused them not to understand the verse. It should say "your needs" "צרכיך."
But then they saw that Raba Bar Bar Chana was carrying this heavy bag, and he should have had to pay the merchant to take it for him, but instead the merchant asked him to let him take it. They concluded that when something is decreed for you from Heaven, then people will ask you to allow them to do it for you.
From here we see one needs no effort, but what is decreed for you will come to you without any effort on your part at all.
This seems fairly plain. And in fact there were a number of years when I did just this and it worked exactly as stated . But in the meantime I fell from this high level of trust. But I still am aware that this kind of trust in God does work.
But it does not absolve one from doing what the Torah requires of you. So you are supposed to learn Torah and learn an honest profession. You might learn Torah only and trust in God to support you. That is legitimate, But if you are going around asking for charity to support your learning Torah that is not legitimate. Because that shows you are not trusting in God, but rather using the Torah as shovel to dig with.
From my point of view I say to everyone--learn Torah at home. Buy yourself the Talmud (Babylonian and Jerusalem Talmuds), the Tosephta, Sifri and Sifra, and plow through them. Every single last word. And Musar (Medieaval Ethics) too. (Duties of the Heart, Paths of the Righteous, מסילת ישרים ספר הישר, ספר המידות לבנימין הרופא etc.--There is a basic canon of Musar books.)
This idea of trust in God is something that I try to say over to myself when I get up in the morning in order to fix this in my soul. [That is I try to say over the verse of Proverbs and the comment of the Gra and he added note where he explained the purpose of the verse is to show that when one trusts in God totally, then he needs no effort at all.